unicore32: switch to generic sigaltstack

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

diff --git a/arch/unicore32/Kconfig b/arch/unicore32/Kconfig
index 60651df..a62786f 100644 (file)
--- a/arch/unicore32/Kconfig
+++ b/arch/unicore32/Kconfig
@@ -16,6 +16,7 @@ config UNICORE32
        select ARCH_WANT_FRAME_POINTERS
        select GENERIC_IOMAP
        select MODULES_USE_ELF_REL
+       select GENERIC_SIGALTSTACK
        help
          UniCore-32 is 32-bit Instruction Set Architecture,
          including a series of low-power-consumption RISC chip

diff --git a/arch/unicore32/kernel/entry.S b/arch/unicore32/kernel/entry.S
index 581630d..bcdedd8 100644 (file)
--- a/arch/unicore32/kernel/entry.S
+++ b/arch/unicore32/kernel/entry.S
@@ -674,11 +674,6 @@ ENTRY(sys_rt_sigreturn)
                b       __sys_rt_sigreturn
 ENDPROC(sys_rt_sigreturn)
 
-ENTRY(sys_sigaltstack)
-               ldw     r2, [sp+], #S_OFF + S_SP
-               b       do_sigaltstack
-ENDPROC(sys_sigaltstack)
-
        __INIT
 
 /*

diff --git a/arch/unicore32/kernel/signal.c b/arch/unicore32/kernel/signal.c
index b8b2ffd..6905f0e 100644 (file)
--- a/arch/unicore32/kernel/signal.c
+++ b/arch/unicore32/kernel/signal.c
@@ -123,8 +123,7 @@ asmlinkage int __sys_rt_sigreturn(struct pt_regs *regs)
        if (restore_sigframe(regs, &frame->sig))
                goto badframe;
 
-       if (do_sigaltstack(&frame->sig.uc.uc_stack, NULL, regs->UCreg_sp)
-                       == -EFAULT)
+       if (restore_altstack(&frame->sig.uc.uc_stack))
                goto badframe;
 
        return regs->UCreg_00;
@@ -265,7 +264,6 @@ static int setup_rt_frame(int usig, struct k_sigaction *ka, siginfo_t *info,
 {
        struct rt_sigframe __user *frame =
                        get_sigframe(ka, regs, sizeof(*frame));
-       stack_t stack;
        int err = 0;
 
        if (!frame)
@@ -275,13 +273,7 @@ static int setup_rt_frame(int usig, struct k_sigaction *ka, siginfo_t *info,
 
        err |= __put_user(0, &frame->sig.uc.uc_flags);
        err |= __put_user(NULL, &frame->sig.uc.uc_link);
-
-       memset(&stack, 0, sizeof(stack));
-       stack.ss_sp = (void __user *)current->sas_ss_sp;
-       stack.ss_flags = sas_ss_flags(regs->UCreg_sp);
-       stack.ss_size = current->sas_ss_size;
-       err |= __copy_to_user(&frame->sig.uc.uc_stack, &stack, sizeof(stack));
-
+       err |= __save_altstack(&frame->sig.uc.uc_stack, regs->UCreg_sp);
        err |= setup_sigframe(&frame->sig, regs, set);
        if (err == 0)
                err |= setup_return(regs, ka, frame->sig.retcode, frame, usig);